Heat Exchangers for the Next Generation of Nuclear Reactors

摘要: The realisation that fossil fuel resources are finite, the associated rising price and a growing concern about greenhouse gas emissions, has resulted in renewed interest nuclear energy. Generation IV other programmes looking at variety of new reactors. These reactors vary type from Very High Temperature Gas Cooled Reactors (VHTR) to Liquid Metal Fast (LFR SFR) with cooling mediums include: - Helium, Supercritical carbon dioxide, Sodium, Lead, Molten salts. In addition is not just focused on production electrical power an efficiency greater than Rankine Cycle (typically 30 -35%); there now genuine energy as heat source for hydrogen production, via Sulphur Iodine Process (SI) or high temperature electrolysis. higher Brayton Cycle, requires both temperatures, up 1000 deg C effectiveness exchange transfer either process cycle. This presents challenges exchangers. If plant efficiencies be improved need for: minimalmore » pressure drop; Compact improve safety economics; An ability build coded exchangers nickel based alloys, oxide dispersion strengthened alloys (ODS) ceramic materials address temperature, life corrosion issues these demanding duties. Heatric already given consideration many challenges. Their Print Circuit Heat Exchanger (PCHE) Formed Plate (FPHE) technology which commercially available today, will fulfill all duties temperatures 950 C. products currently under development further increase range, while offering resistance operational life. paper outlines required, particular attention material selection. It objective this study demonstrate such PCHE FPHE able meet above (authors)« less